Can someone truly love you while flirting and keeping backup options open?

Imagine being in a relationship with someone who says they love you, treats you well, and makes plans for the future, but still flirts with other people online or enjoys keeping backup options around. Would you consider that harmless attention-seeking, or a sign that they aren't truly committed? Can someone love you while still wanting attention from others, or does real love mean making your partner feel like they're enough? I'd love to hear honest opinions from both guys and girls!

Can someone truly love you while flirting and keeping backup options open?
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